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BUILD_OPENSIM.md

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Building OpenSim (Ubuntu 18.04)

For this to work, we currently maintain a custom version of opensim-core until some of the fixes are included in the mainstream branch. For you to build this, you can run the script provided in this repository:

build_opensim-core

This will build and install OpenSim libraries in the install folder inside opensim-core. After building OpenSim, configure the environmental variables as follows:

export OPENSIM_HOME=/path-to-filesystem/opensim-core
export OpenSim_DIR=$OPENSIM_HOME/lib/cmake/OpenSim
export LD_LIBRARY_PATH=$OPENSIM_HOME/lib:$LD_LIBRARY_PATH
export PATH=$OPENSIM_HOME/bin:$PATH
export PATH=$OPENSIM_HOME/libexec/simbody:$PATH

The Python bindings are build with the system Python version (substitute X.X below). To install run:

cd $OPENSIM_HOME/lib/pythonX.X/site-packages
python3 setup.py install --user

To test the Python bindings try importing OpenSim in Python3:

cd ~
python3 -c "import opensim"

Sometimes the above command fails. The opensim folder that is created in $OPENSIM_HOME/lib/pythonX.X/site-packages after running python3 setup.py install --user may not be properly copied in the Python site-packages. In that case, you can copy it manually.

cd -rf $OPENSIM_HOME/lib/pythonX.X/site-packages/opensim ~/.local/lib/pythonX.X/site-packages

Pre-build version of OpenSim v4.1 for Ubuntu 18.04

For Windows or Mac users one can download the pre-build version of OpenSim v4.1 and setup the Python bindings.

For convenience a pre-build version of OpenSim v4.1 for Ubuntu 18.04 can be downloaded through the following URL:

https://sourceforge.net/projects/dependencies/files/opensim-core/opensim-core-4.1-ubuntu-18.04.tar.xz/download

Extract and move the opensim-core folder to a convenient location. Then configure the environmental variables as follows:

export OPENSIM_HOME=/path-to-filesystem/opensim-core
export OpenSim_DIR=$OPENSIM_HOME/lib/cmake/OpenSim
export LD_LIBRARY_PATH=$OPENSIM_HOME/lib:$LD_LIBRARY_PATH
export PATH=$OPENSIM_HOME/bin:$PATH
export PATH=$OPENSIM_HOME/libexec/simbody:$PATH

The Python bindings were build with Python 3.6. To install run:

cd $OPENSIM_HOME/lib/python3.6/site-packages
python3 setup.py install --user

To test the Python bindings try importing OpenSim in python3:

python3 -c "import opensim"